About: http://webisa.webdatacommons.org/334875552

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Other types of non-energized, pressure-controlled valves could be used, of course, such as a spring-loaded ball pressed against a valve seat and opening upon the application of excess pressure.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au